Update and cleanup dependencies
Update and cleanup dependencies

 - baseCode to 1.0.29
 - spring to 3.2.18
 - spring-security to 3.2.9
 - commons-beanutils to 1.9.4
 - commons-lang3 to 3.12.0

Update Hibernate to 3.6.10 and remove mention to ehcache as well as
ehcache exclusions and javassist. These dependencies are controlled by
Hibernate and we should stick to its versions.

Remove redundant <type>jar</type>.

Remove Maven Central repository (revert 3dee94dc0d10383c728f9947f1fcb0bd2a431ece)
since we now use a fixed Maven for the CI.

ppavlidis/gsec